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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 30, 2022 | Dec. 31, 2021 | Dec. 25, 2020
Class of Stock |  |  |
Foreign Currency Transaction Loss, before Tax |  | $ 24,000 |
Pension Benefits |  |  |
Class of Stock |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement | $ 0 | (12,285) | $ 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement | $ 0 | (12,285) | $ 0
Pension Plan - Blue and Gray Plans | Pension Benefits |  |  |
Class of Stock |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 12,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | $ 12,000 |
Cumulative Preferred Stock |  |  |
Class of Stock |  |  |
Preferred stock authorized | 22,549 |  |
Preferred stock par value | $ 100 |  |
Preferred Stock |  |  |
Class of Stock |  |  |
Preferred stock authorized | 3,000,000 |  |
Preferred stock par value | $ 1 |  |

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